#C1F80AChartreuse (#C1F80A) is a very light, vivid yellow-green with an OKLCH hue of 124°, lightness 0.91 and chroma 0.225. It sits on the transitional side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #C1F80A |
|---|---|
| RGB | rgb(193, 248, 10) |
| HSL | hsl(74, 94%, 51%) |
| HSV | hsv(74, 96%, 97%) |
| CMYK | cmyk(22%, 0%, 96%, 3%) |
| CIE Lab | lab(91 -43 87.3) |
| OKLCH | oklch(0.908 0.225 124) |
Under warm 2700K interior light Chartreuse shifts subtly: leans toward yellow; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.2), so it is a lighting-stable choice.
#cdf100 — ΔE 2.2, shifts subtly: leans toward yellow#caf900 — ΔE 1.1, shifts subtly: leans toward yellow#c1f80a — ΔE 0.0, is virtually unchanged#c1f912 — ΔE 0.3, is virtually unchangedTest Chartreuse in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 1.26:1 and against black 16.7:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid white text on this color entirely.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#c1f80a · #adde00 · #8bb300 · #6a8a00 · #4b6300 · #2e3f00
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#c1f80a · #d9d500 · #dfb500 · #dd9800 · #d87900 · #d45600
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#c1f80a · #64d8be · #89b200 · #009880 · #567100 · #005748
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#c1f80a · #b3c595 · #8aa84c · #9644df · #324400 · #1b2600
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#c1f80a · #c8bfd4 · #838e70 · #554f5e · #1c2605 · #020005
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#f4effb · #cbc6d3 · #9f99a7 · #261e2f · #05010c · #c1f80a
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#c1f80a · #cdb9e8 · #a267df · #7006b3 · #310053 · #010400
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#c1f80a · #dcc0dc · #7a71c8 · #835272 · #2b3552 · #041409
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#c1f80a · #9fc9ed · #008fdf · #990046 · #45001b · #000614
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#c1f80a · #90cfde · #0099b2 · #7006b3 · #440700 · #050010
#C8F950 · #CFFB71 · #D6FC8C · #DDFCA4 · #E4FDBA
#9DCA00 · #7A9E00 · #597400 · #3A4D00 · #1D2900
#C7F464 · #CEF08D · #D5EBAF
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.